Cancellation of tax authorization will affect the loan amount, because banks and lending institutions need to check the tax information of borrowers to evaluate their repayment ability and credit status. Tax authorization allows banks to obtain the borrower's tax records and related information, which helps banks to evaluate the borrower's financial situation more comprehensively. If the tax authorization is cancelled, the bank will not be able to obtain these key information, which will lead the lending institution to doubt the borrower's credit evaluation, thus affecting the approval and conditions of the loan amount.